Oil Injection

[wardjame]

I have a 05 90hp Yamaha, How can we till that oil is being injected into the CYL without taking it on the water and may cause damage.

[robert graham]

If there's any question about the oiling system, then mix outboard motor oil in your gas tank at 50:1 and run the motor, check oil injection tank level. If oiling system is working fine, the extra oil won't hurt the motor, other than maybe a bit more smoke. Good Luck!